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 * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package jdk.graal.compiler.annotation;

import jdk.vm.ci.meta.ResolvedJavaType;

/**
 * Represents an enum element within an {@link AnnotationValue}.
 */
public final class EnumElement {
    /**
     * The type of the enum.
     */
    public final ResolvedJavaType enumType;

    /**
     * The name of the enum constants.
     */
    public final String name;

    /**
     * Creates an enum constant.
     *
     * @param enumType the {@linkplain Enum enum type}
     * @param name the {@linkplain Enum#name() name} of the enum
     * @throws IllegalArgumentException if {@code enumType} is not an enum type
     */
    public EnumElement(ResolvedJavaType enumType, String name) {
        if (!enumType.isEnum()) {
            throw new IllegalArgumentException(enumType.toClassName() + " is not an enum type");
        }
        this.enumType = enumType;
        this.name = name;
    }

    @Override
    public String toString() {
        return name;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof EnumElement that) {
            return this.enumType.equals(that.enumType) && this.name.equals(that.name);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return this.enumType.hashCode() ^ this.name.hashCode();
    }
}
